Grade 3
CCSS Math Standard: 3.OA.9
Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.
Can you make each side of this triangle add up to 9 using the digits 1-6?
Ready for a tricky counting and divisibility game?
In 1932, a leading authority on rattlesnakes, Laurence Klauber, discovered a startling pattern within a triangle of primes.
When we're adding and subtracting, do evens make odds into evens? Do odds make evens odd? Which one has… more power!?
The commutative and associative properties are a whole lot more interesting when you apply them to a mathematical operation that you created!
Say you have a dollar. Say you can double that dollar each day: $1, $2, $4, and so on. How long will it take to reach… one million dollars? Not as long as you might think!